Geometry Practice Test 6

Question : 13 of 39

Marks: +1, -0

If 20 lines are drawn in a plane such that no two of them are parallel and no three are concurrent, the number of points in which they intersect each other is:

Validate

Solution:

Number of lines drawn = n = 20
Number of points which they intersect
=

n/2 (n-1)

{20}/2 (20-1)

= 10(19) = 190 points

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